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Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 5, May 1950)
[ACTIVE]

The Open-Air Concentrated-Arc Lamp

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
The open-air concentrated-arc lamp is a new form of the concentrated arc which operates in the open air and does not require any enclosing bulb or protective atmosphere. The light source is a sharply defined, circular spot which is formed on the end of the electrode by a thin film of incandescent molten zirconium. The lamps can be operated from alternating or direct current and can be made in sizes up to several kilowatts. A 1-kw lamp operating on alternating current draws 18 amp at 55 v and produces 3000 candlepower from a spot 5.4 mm in diameter whose average brightness is 130 c/sq mm. The radiation has a continuous black-body type of spectral distribution and a constant color temperature of 3600 K. Due to a unique operating principle whereby the zirconium metal is constantly renewed from its own products of combustion, the lamps can have lives of several hundred hours. The exhaust products arc nontoxic and the electrodes arc replaceable. The lamp is characterized by extreme stability and ease of operation. It is expected to find application in projection, television, flood and spot lighting and other fields which require intense light sources.
Publication Date
1950-05-01
DOI
10.5594/J05212
Link
https://doi.org/10.5594/J05212
Author(s)
W. D. Buckingham
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J05212.json

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W. D. Buckingham; The Open-Air Concentrated-Arc Lamp, Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 5, May 1950); SMPTE, 1950. Available at https://doi.org/10.5594/J05212
Snippet:
W. D. Buckingham; The Open-Air Concentrated-Arc Lamp, Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 5, May 1950); SMPTE, 1950. Available at https://doi.org/10.5594/J05212

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W. D. Buckingham; The Open-Air Concentrated-Arc Lamp, Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 5, May 1950); SMPTE, 1950. Available at https://doi.org/10.5594/J05212
Snippet:
<span class="citation">W. D. Buckingham; <cite>The Open-Air Concentrated-Arc Lamp</cite>, Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 5, May 1950); SMPTE, 1950. Available at <a href="https://doi.org/10.5594/J05212" target="_blank" rel="noopener">https://doi.org/10.5594/J05212</a></span>

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Preview:
W. D. Buckingham; The Open-Air Concentrated-Arc Lamp, Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 5, May 1950); SMPTE, 1950
doi: 10.5594/J05212
url: https://doi.org/10.5594/J05212
Snippet:
<li>
W. D. Buckingham; <cite id="bib-10-5594-j05212">The Open-Air Concentrated-Arc Lamp</cite>, Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 5, May 1950); SMPTE, 1950
<span class="doi">10.5594/J05212</span>
</li>